The US system has decided that the sitting president is not just personally immune from any legal action that could be imagined to be done in an official capaci

The US system has decided that the sitting president is not just personally immune from any legal action that could be imagined to be done in an official capacity, but also holds the power to hold anybody else immune as well. What legal actions could you even impose on such a person? I also don't see what indications you have that the US is moving in a sensible direction? It seems unlikely to me that the US will learn anything from this.